An increasing number of children across the United States are being diagnosed with autism and other developmental disabilities, according to comprehensive new research released by the Centers for Disease Control and Prevention. The findings indicate a profound shift in public health trends over a remarkably short period, revealing that developmental conditions are becoming significantly more prevalent—or significantly better identified—among the nation’s youth.
Between the years 2019 and 2024, the proportion of parents reporting that their child had been diagnosed with a developmental disability experienced a sharp upward trajectory, climbing from 16.7 percent to 20.5 percent. This means that by the time the most recent data was collected, approximately one in every five children aged 3 to 17 in the United States was reported by their parents to have a developmental disability.
The findings were recently published in the prestigious medical journal Pediatrics. The research draws upon extensive data gathered through the National Health Interview Survey, an ongoing, nationally representative government questionnaire that regularly asks individuals and families from all corners of the country about their various healthcare experiences, conditions, and access to medical services.
To determine the prevalence of these conditions, the survey methodology involves asking parents specific questions regarding whether they have ever been told by a healthcare professional that their child has a developmental disability. These specified conditions traditionally include autism spectrum disorder, attention-deficit/hyperactivity disorder, intellectual disability, or any other diagnosed developmental delay. Additionally, parents are asked whether a school representative or a healthcare professional has ever informed them that their child lives with a learning disability. For the purposes of this landmark study, children were categorized as having "any developmental disability" if their parents indicated that they met the criteria for any of these five distinct categories.
When breaking down the data by specific diagnoses among children ages 3 to 17, the researchers discovered that prevalence rose across nearly every measured category. The study documented substantial increases for almost every classification, with the sole exception of intellectual disability, which remained relatively stable by comparison.
Autism spectrum disorder alone experienced a dramatic surge, jumping by more than 42 percent over the study period. Furthermore, this dramatic growth in autism diagnoses was not distributed evenly across the general population; researchers noted sizable and notable increases specifically among children ages 3 to 5, among girls, among children living outside of major metropolitan areas, and among kids hailing from low-income families. These demographic shifts highlight a changing landscape in how and where autism is being recognized and diagnosed.
Other developmental and behavioral conditions similarly showed notable upward movements. The number of parents reporting that their child had been diagnosed with attention-deficit/hyperactivity disorder, commonly known as ADHD, climbed by 26 percent. Meanwhile, reports of learning disabilities and other unspecified developmental delays each grew by approximately 16 percent. In contrast, diagnoses of intellectual disability saw a much smaller increase, ticking upward by just over 6 percent.
Taken together, the researchers observed that the overall percentage of children diagnosed with developmental disabilities increased significantly throughout the years studied, culminating in the milestone where roughly 20 percent of school-aged children and adolescents were reported to have at least one such diagnosis.
Benjamin Zablotsky, a statistician at the CDC’s National Center for Health Statistics who served as the lead author of the study, pointed out that the distinct uptick observed among certain demographic groups—most notably among very young children—had not been documented as prominently in previous government reports. This suggests that the landscape of early childhood identification is actively evolving.
"We believe these new increases could be related to earlier detection and awareness," Zablotsky explained, pointing to the possibility that systems are catching developmental conditions much earlier in a child’s life than was standard practice in past decades.
The public health implications of these findings have drawn commentary from external experts who study population health and disability policy. Scott Landes, a sociology professor at Syracuse University who was not involved in conducting the research, argued that the documented rise in developmental disability prevalence should be interpreted as a fundamentally positive public health development rather than an alarmist trend.
"Research suggests that better screening, greater awareness, and reduced stigma explain at least part of the increase, which means that more children are being identified and connected to services they previously would have missed," Landes said. He emphasized that the shifting statistics reflect broader systemic improvements in healthcare delivery and educational outreach rather than a sudden, unexplained biological crisis.
"A higher reported prevalence rate by parents is best understood, at least in part, as progress in finding and serving disabled children who were always there but were not receiving needed services," Landes added.
As public health officials and educational institutions continue to digest the data from the National Health Interview Survey, the focus remains on ensuring that the growing number of children identified with autism, ADHD, learning disabilities, and developmental delays can successfully access the specialized support, therapeutic interventions, and educational accommodations they require to thrive.
